linux-kernel - Re: [RFC][PATCH 1/4] cgroup: support per cgroup subsys state ID (CSS ID)

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Date:	Fri, 9 Jan 2009 16:23:53 -0800
From:	Paul Menage <menage@...gle.com>
To:	KAMEZAWA Hiroyuki <kamezawa.hiroyu@...fujitsu.com>
Cc:	"linux-mm@...ck.org" <linux-mm@...ck.org>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	"balbir@...ux.vnet.ibm.com" <balbir@...ux.vnet.ibm.com>,
	"nishimura@....nes.nec.co.jp" <nishimura@....nes.nec.co.jp>,
	"lizf@...fujitsu.com" <lizf@...fujitsu.com>
Subject: Re: [RFC][PATCH 1/4] cgroup: support per cgroup subsys state ID (CSS 
	ID)

On Thu, Jan 8, 2009 at 1:28 AM, KAMEZAWA Hiroyuki
<kamezawa.hiroyu@...fujitsu.com> wrote:
> + *
> + * Looking up and scanning function should be called under rcu_read_lock().
> + * Taking cgroup_mutex()/hierarchy_mutex() is not necessary for all calls.

Can you clarify here - do you mean "not necessary for any calls"
(calls to what?) or "not necessary for some calls"? I presume the
former.

Paul
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